One other thought here...

When all your interior lights come on, does the courtesy light in the door in question work? The 2000 model year (in the 2000-2005 series) was the only one with door panel courtesy lights that actually lit up. I'm wondering if it might be for these instead. The only reason I'm curious is because GM became very good at not installing wiring for options not included in a specific vehicle build. I've really noticed this with the 2K+ Bonneville.

Okay, it'* one in the morning and ten degrees outside, but i had to check. The courtesy light on the door with the regulator I replaced works, the light on the door with the regulator I haven't replaced yet doesn't



....... what does that mean?

You probably have a couple of bulbs burned out. When you take your door apart, have a look. It'* the most likely suspect.

okay so what you're saying is that, since my lights work, the wiring harness is for something else gotchya

has the holes and grilles for speakers, but no speakers. I haven't pulled the door apart to see if there'* anything in the way of a wiring harness back there.

If you have a GXP you will have wiring and speakers. The eight speaker Monsoon system is standard with this trim level.

Is it an analog to the cabin air filter mount that comes without?

Not exactly sure what GM was thinking. The cabin air filter has always been available as a dealer installed option/accessory but they stopped installing during vehicle manufacturing quite some time back (IIRC somewhere in around the 2001 mark). Why? Your guess is as good as mine. Seems to make very little sense to me, especially if you were to order the top trim level.

As for the stereo, the SSEi and GXP have always come standard with a premium sound system. This includes an AM/FM/CD/Cassette, eight speakers and an external amp (Bose for 2000-01 and Monsoon for 2002-05). XM was never standard but was available in the US only Bonneville for 2003+ (in any trim level if I'm not mistaken). A 12 disc trunk mounted CD changer was also available in the SSEi & GXP.

The SE and SLE never had the premium sound system option available. These trim levels always had six speakers and amplification is provided by the head unit. The two missing speakers are in the rear doors.